01Swipe-to-delete reveal

<main class="stage">
  <ul class="swipe-list" aria-label="Inbox">
    <li class="swipe-row is-demo">
      <button class="swipe-row__delete" type="button">Delete</button>
      <div class="swipe-row__content" tabindex="0">
        <span class="swipe-row__title">Weekly meeting reminder</span>
        <span class="swipe-row__desc">Swipe left to try it</span>
      </div>
    </li>
    <li class="swipe-row">
      <button class="swipe-row__delete" type="button">Delete</button>
      <div class="swipe-row__content" tabindex="0">
        <span class="swipe-row__title">Design feedback</span>
        <span class="swipe-row__desc">Yesterday 6:20 PM</span>
      </div>
    </li>
  </ul>
</main>

@use "../../../../site/static/demo-tokens" as *;

$duration: $dur-quick;                                 // 콘텐츠가 밀리는 시간
$easing: $ease-out;
$color: $error;                                        // 삭제 버튼 색

@include stage($stage-ink);

.swipe-list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: min(280px, 82vw);
  display: flex;
  flex-direction: column;
  gap: $sp-3;
}

.swipe-row {
  position: relative;
  overflow: hidden;
  border-radius: $r-card;
  transition: height $duration $easing;
}

.swipe-row__delete {
  position: absolute;
  inset: 0 0 0 auto;
  width: 88px;
  border: 0;
  border-radius: $r-card;
  background: $color;
  color: $stage-paper;
  font-weight: 700;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
}

.swipe-row__content {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: $sp-1;
  padding: $sp-4;
  border-radius: $r-card;
  background: $stage-paper;
  transform: translateX(0);
  transition: transform $duration $easing;
  cursor: grab;
  touch-action: pan-y;
}
.swipe-row__content:focus-visible { outline: 2px solid $subject-blue; outline-offset: 2px; }

.swipe-row__title { display: block; font-weight: 700; font-size: 14px; color: $stage-ink; }
.swipe-row__desc { display: block; margin-top: $sp-1; font-size: 12px; color: rgba(23, 20, 26, .6); }

.swipe-row.is-demo .swipe-row__content { animation: swipe-loop $dur-loop $easing infinite; }

@keyframes swipe-loop {
  0%, 15%  { transform: translateX(0); }
  45%, 65% { transform: translateX(-88px); }
  90%, 100% { transform: translateX(0); }
}

@media (prefers-reduced-motion: reduce) {
  .swipe-row__content { transition: none; }
  .swipe-row { transition: none; }
  .swipe-row.is-demo .swipe-row__content { animation: none; transform: translateX(-88px); }
}

html, body {
  margin: 0;
  overflow: hidden;
}

.stage {
  box-sizing: border-box;
  min-height: 100vh;
  display: grid;
  place-items: center;
  margin: 0;
  background: #17141a;
  font-family: -apple-system, "Segoe UI", "Noto Sans KR", sans-serif;
  padding: clamp(8px, 4vw, 24px);
}

.swipe-list {
  list-style: none;
  margin: 0;
  padding: 0;
  width: min(280px, 82vw);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.swipe-row {
  position: relative;
  overflow: hidden;
  border-radius: 16px;
  transition: height 220ms ease-out;
}

.swipe-row__delete {
  position: absolute;
  inset: 0 0 0 auto;
  width: 88px;
  border: 0;
  border-radius: 16px;
  background: #c2361a;
  color: #ffffff;
  font-weight: 700;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
}

.swipe-row__content {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px;
  border-radius: 16px;
  background: #ffffff;
  transform: translateX(0);
  transition: transform 220ms ease-out;
  cursor: grab;
  touch-action: pan-y;
}

.swipe-row__content:focus-visible {
  outline: 2px solid #2f6df6;
  outline-offset: 2px;
}

.swipe-row__title {
  display: block;
  font-weight: 700;
  font-size: 14px;
  color: #17141a;
}

.swipe-row__desc {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: rgba(23, 20, 26, 0.6);
}

.swipe-row.is-demo .swipe-row__content {
  animation: swipe-loop 2s ease-out infinite;
}

@keyframes swipe-loop {
  0%, 15% {
    transform: translateX(0);
  }
  45%, 65% {
    transform: translateX(-88px);
  }
  90%, 100% {
    transform: translateX(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .swipe-row__content {
    transition: none;
  }
  .swipe-row {
    transition: none;
  }
  .swipe-row.is-demo .swipe-row__content {
    animation: none;
    transform: translateX(-88px);
  }
}

(function () {
  var OPEN = 88, DEL = 140;
  document.querySelectorAll('.swipe-row').forEach(function (row) {
    var content = row.querySelector('.swipe-row__content');
    var del = row.querySelector('.swipe-row__delete');
    var startX = 0, dx = 0, dragging = false;
    function remove() {
      row.style.height = row.offsetHeight + 'px';
      requestAnimationFrame(function () {
        row.classList.add('is-leaving');
        row.style.height = '0px';
      });
      row.addEventListener('transitionend', function h(e) {
        if (e.propertyName === 'height') { row.removeEventListener('transitionend', h); row.remove(); }
      });
    }
    content.addEventListener('pointerdown', function (e) {
      row.classList.remove('is-demo');
      dragging = true; startX = e.clientX; content.setPointerCapture(e.pointerId);
    });
    content.addEventListener('pointermove', function (e) {
      if (!dragging) return;
      dx = Math.min(0, Math.max(-DEL - 30, e.clientX - startX));
      content.style.transform = 'translateX(' + dx + 'px)';
    });
    function end() {
      if (!dragging) return;
      dragging = false;
      if (dx < -DEL) { remove(); return; }
      content.style.transform = dx < -OPEN / 2 ? 'translateX(-' + OPEN + 'px)' : '';
      dx = 0;
    }
    content.addEventListener('pointerup', end);
    content.addEventListener('pointercancel', end);
    content.addEventListener('keydown', function (e) {
      if (e.key === 'Delete' || e.key === 'Backspace') { row.classList.remove('is-demo'); remove(); }
    });
    del.addEventListener('click', function () { remove(); });
  });
})();

import { useRef, useState, type CSSProperties, type PointerEvent } from "react";
import styles from "./SwipeDeleteReveal.module.scss";

export type SwipeDeleteRevealProps = {
  title: string;
  desc: string;
  /** 콘텐츠가 밀리는 시간 (기본 220ms) */
  duration?: number;
  easing?: string;
  /** 삭제 버튼 색 */
  color?: string;
};

type Vars = CSSProperties & { "--duration"?: string; "--easing"?: string; "--color"?: string };

const OPEN = 88;
const DEL = 140;

/** pointer 드래그로 --dx 를 직접 놓고, 임계값을 넘기면 행을 지운다 */
export default function SwipeDeleteReveal({
  title,
  desc,
  duration = 220,
  easing = "ease-out",
  color = "#c2361a",
}: SwipeDeleteRevealProps) {
  const [removed, setRemoved] = useState(false);
  const [dx, setDx] = useState(0);
  const dragging = useRef(false);
  const startX = useRef(0);
  const vars: Vars = { "--duration": `${duration}ms`, "--easing": easing, "--color": color };

  if (removed) return null;

  const down = (e: PointerEvent<HTMLDivElement>) => {
    dragging.current = true;
    startX.current = e.clientX;
    e.currentTarget.setPointerCapture(e.pointerId);
  };
  const move = (e: PointerEvent<HTMLDivElement>) => {
    if (!dragging.current) return;
    setDx(Math.min(0, Math.max(-DEL - 30, e.clientX - (startX.current ?? 0))));
  };
  const up = () => {
    if (!dragging.current) return;
    dragging.current = false;
    if (dx < -DEL) { setRemoved(true); return; }
    setDx(dx < -OPEN / 2 ? -OPEN : 0);
  };
  const key = (e: any) => {
    if (e.key === "Delete" || e.key === "Backspace") setRemoved(true);
  };

  return (
    <li className={styles.row} style={vars}>
      <button className={styles.del} type="button" onClick={() => setRemoved(true)}>삭제</button>
      <div
        className={styles.content}
        tabIndex={0}
        style={{ transform: `translateX(${dx}px)` }}
        onPointerDown={down}
        onPointerMove={move}
        onPointerUp={up}
        onPointerCancel={up}
        onKeyDown={key}
      >
        <span className={styles.title}>{title}</span>
        <span className={styles.desc}>{desc}</span>
      </div>
    </li>
  );
}